Photonuclear Production of 67Cu From Gallium

Santistevan, Geno; Bentley, R.; Wells, D.; Hutton, A.; Stavola, A.; Benson, S.; Jordan, K.; Gubeli, J.; Degtiarenko, P.; Dabill, L.

doi:10.1080/00295639.2023.2178232

Photonuclear Production of ⁶⁷Cu From Gallium

Journal Article · Thu Apr 06 00:00:00 EDT 2023 · Nuclear Science and Engineering

DOI:https://doi.org/10.1080/00295639.2023.2178232· OSTI ID:1983585

^[1]; Bentley, R. ^[1]; Wells, D. ^[1]; Hutton, A. ^[2]; Stavola, A. ^[2]; Benson, S. ^[2]; Jordan, K. ^[2]; Gubeli, J. ^[2]; Degtiarenko, P. ^[2]; Dabill, L. ^[3]

New Mexico Institute of Mining and Technology, Socorro, NM (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Coe College, Cedar Rapids, IA (United States)

Copper-67 is a radioisotope of interest for medical imaging and therapy as well as for under- standing stellar and interstellar evolution pertaining to the formation of proton-rich nuclei. Since ⁶⁷Cu decays 100% to ⁶⁷Zinc, understanding this reaction can shed light on the abundance of this and other p-nuclei elements in the universe. Here, the photonuclear production of ⁶⁷Cu from ⁷¹Ga and natural gallium is examined as an alternative to its photoproduction from zinc. Two research and development production runs were performed at Thomas Jefferson National Accelerator Facility using an electron linac. During the first run, an 805-W, 30.9-MeV beam was used to irradiate a 1-mm tungsten radiator to create a bremsstrahlung flux. The resulting gamma photons irradiated 50.9 g of natural gallium encased in a graphite crucible for 24.2 h; 7.02 Bq/W∙s∙kg of ⁶⁷Cu activity was produced. During the second run, a 4380-W, 31.5-MeV beam was used for 12.0 h on the same target containing 60 g of natural gallium; 6.41 Bq/W∙s∙kg of ⁶⁷Cu activity was produced. Because of the difficulties in spectroscopically differentiating ⁶⁷Cu from ⁶⁷Ga, prior to each run, an isotopically pure ⁷¹Ga disk was irradiated using a 100-W beam for 1 h, at the same respective energies. Finally, these baseline irradiations allowed for separation of ⁶⁷Cu from ⁶⁷Ga in the spectroscopic measurements of the natural gallium targets.

Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-06OR23177; SC0019411

OSTI ID:: 1983585

Report Number(s):: DOE/OR/23177-6296; JLAB-ACP-23-3843

Journal Information:: Nuclear Science and Engineering, Journal Name: Nuclear Science and Engineering Journal Issue: 1 Vol. 198; ISSN 0029-5639

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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